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Christian Nennemann d8c1392587 chore: public-readiness cleanup 
- Remove default Grafana password (fail loudly if unset)
- Clean up stale delivery-proof TODO (already implemented at RPC layer)
- Document TUI send as local-only, point to REPL for E2E delivery
- Gitignore AI workflow files (CLAUDE.md, master-prompt.md, ai_team.py)
- Remove 5 orphaned v1 crates (bot, ffi, gen, gui, mobile)
- Commit ROADMAP.html updates
2026-03-21 19:14:05 +01:00

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<h1 id="roadmap--quicproquo"><a class="header" href="#roadmap--quicproquo">Roadmap — quicproquo</a></h1>
<blockquote>
<p>From proof-of-concept to production-grade E2E encrypted messaging.</p>
<p>Each phase is designed to be tackled sequentially. Items within a phase
can be parallelised. Check the box when done.</p>
</blockquote>
<hr>
<h2 id="phase-1--production-hardening-critical"><a class="header" href="#phase-1--production-hardening-critical">Phase 1 — Production Hardening (Critical)</a></h2>
<p>Eliminate all crash paths, enforce secure defaults, fix deployment blockers.</p>
<ul>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>1.1 Remove <code>.unwrap()</code> / <code>.expect()</code> from production paths</strong></p>
<ul>
<li>Replace <code>AUTH_CONTEXT.read().expect()</code> in client RPC with proper <code>Result</code></li>
<li>Replace <code>"0.0.0.0:0".parse().unwrap()</code> in client with fallible parse</li>
<li>Replace <code>Mutex::lock().unwrap()</code> in server storage with <code>.map_err()</code></li>
<li>Audit: <code>grep -rn 'unwrap()\|expect(' crates/</code> outside <code>#[cfg(test)]</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>1.2 Enforce secure defaults in production mode</strong></p>
<ul>
<li>Reject startup if <code>QPQ_PRODUCTION=true</code> and <code>auth_token</code> is empty or <code>"devtoken"</code></li>
<li>Require non-empty <code>db_key</code> when using SQL backend in production</li>
<li>Refuse to auto-generate TLS certs in production mode (require existing cert+key)</li>
<li>Already partially implemented — verify and harden the validation in <code>config.rs</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>1.3 Fix <code>.gitignore</code></strong></p>
<ul>
<li>Add <code>data/</code>, <code>*.der</code>, <code>*.pem</code>, <code>*.db</code>, <code>*.bin</code> (state files), <code>*.ks</code> (keystores)</li>
<li>Verify no secrets are already tracked: <code>git ls-files data/ *.der *.db</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>1.4 Fix Dockerfile</strong></p>
<ul>
<li>Sync workspace members (handle excluded <code>p2p</code> crate)</li>
<li>Create dedicated user/group instead of <code>nobody</code></li>
<li>Set writable <code>QPQ_DATA_DIR</code> with correct permissions</li>
<li>Test: <code>docker build . &amp;&amp; docker run --rm -it qpq-server --help</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>1.5 TLS certificate lifecycle</strong></p>
<ul>
<li>Document CA-signed cert setup (Let’s Encrypt / custom CA)</li>
<li>Add <code>--tls-required</code> flag that refuses to start without valid cert</li>
<li>Log clear warning when using self-signed certs</li>
<li>Document certificate rotation procedure</li>
</ul>
</li>
</ul>
<hr>
<h2 id="phase-2--test--ci-maturity"><a class="header" href="#phase-2--test--ci-maturity">Phase 2 — Test &amp; CI Maturity</a></h2>
<p>Build confidence before adding features.</p>
<ul>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>2.1 Expand E2E test coverage</strong></p>
<ul>
<li>Auth failure scenarios (wrong password, expired token, invalid token)</li>
<li>Message ordering verification (send N messages, verify seq numbers)</li>
<li>Concurrent clients (3+ members in group, simultaneous send/recv)</li>
<li>OPAQUE registration + login full flow</li>
<li>Queue full behavior (&gt;1000 messages)</li>
<li>Rate limiting behavior (&gt;100 enqueues/minute)</li>
<li>Reconnection after server restart</li>
<li>KeyPackage exhaustion (fetch when none available)</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>2.2 Add unit tests for untested paths</strong></p>
<ul>
<li>Client retry logic (exponential backoff, jitter, retriable classification)</li>
<li>REPL input parsing edge cases (empty input, special characters, <code>/</code> commands)</li>
<li>State file encryption/decryption round-trip with bad password</li>
<li>Token cache expiry</li>
<li>Conversation store migrations</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>2.3 CI hardening</strong></p>
<ul>
<li>Add <code>.github/CODEOWNERS</code> (crypto, auth, wire-format require 2 reviewers)</li>
<li>Ensure <code>cargo deny check</code> runs on every PR (already in CI — verify)</li>
<li>Add <code>cargo audit</code> as blocking check (already in CI — verify)</li>
<li>Add coverage reporting (tarpaulin or llvm-cov)</li>
<li>Add CI job for Docker build validation</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>2.4 Clean up build warnings</strong></p>
<ul>
<li>Fix Cap’n Proto generated <code>unused_parens</code> warnings</li>
<li>Remove dead code / unused imports</li>
<li>Address <code>openmls</code> future-incompat warnings</li>
<li>Target: <code>cargo clippy --workspace -- -D warnings</code> passes clean</li>
</ul>
</li>
</ul>
<hr>
<h2 id="phase-3--client-sdks-native-quic--capn-proto-everywhere"><a class="header" href="#phase-3--client-sdks-native-quic--capn-proto-everywhere">Phase 3 — Client SDKs: Native QUIC + Cap’n Proto Everywhere</a></h2>
<p><strong>No REST gateway. No protocol dilution.</strong> The <code>.capnp</code> schemas are the
interface definition. Every SDK speaks native QUIC + Cap’n Proto. The
project name stays honest.</p>
<h3 id="why-this-matters"><a class="header" href="#why-this-matters">Why this matters</a></h3>
<p>The name is <strong>quic</strong>n<strong>proto</strong>chat — the protocol IS the product. Instead
of adding an HTTP translation layer that loses zero-copy performance and
adds base64 overhead, we invest in making the native protocol accessible
from every language that has QUIC + Cap’n Proto support, and provide
WASM/FFI for the crypto layer.</p>
<h3 id="architecture"><a class="header" href="#architecture">Architecture</a></h3>
<pre><code> Server: QUIC + Cap'n Proto (single protocol, no gateway)
Client SDKs:
┌─── Rust quinn + capnp-rpc (existing, reference impl)
├─── Go quic-go + go-capnp (native, high confidence)
├─── Python aioquic + pycapnp (native QUIC, manual framing)
├─── C/C++ msquic/ngtcp2 + capnproto (reference impl, full RPC)
└─── Browser WebTransport + capnp (WASM) (QUIC transport, no HTTP needed)
Crypto layer (client-side MLS, shared across all SDKs):
┌─── Rust crate (native, existing)
├─── WASM module (browsers, Node.js, Deno)
└─── C FFI (Swift, Kotlin, Python, Go via cgo)
</code></pre>
<h3 id="language-support-reality-check"><a class="header" href="#language-support-reality-check">Language support reality check</a></h3>
<div class="table-wrapper">
<table>
<thead>
<tr><th>Language</th><th>QUIC</th><th>Cap’n Proto</th><th>RPC</th><th>Confidence</th></tr>
</thead>
<tbody>
<tr><td><strong>Rust</strong></td><td>quinn ✅</td><td>capnp-rpc ✅</td><td>Full ✅</td><td>Existing</td></tr>
<tr><td><strong>Go</strong></td><td>quic-go ✅</td><td>go-capnp ✅</td><td>Level 1 ✅</td><td>High</td></tr>
<tr><td><strong>Python</strong></td><td>aioquic ✅</td><td>pycapnp ⚠️</td><td>Manual framing</td><td>Medium</td></tr>
<tr><td><strong>C/C++</strong></td><td>msquic/ngtcp2 ✅</td><td>capnproto ✅</td><td>Full ✅</td><td>High</td></tr>
<tr><td><strong>Browser</strong></td><td>WebTransport ✅</td><td>WASM ✅</td><td>Via WASM bridge</td><td>Medium</td></tr>
</tbody>
</table>
</div>
<h3 id="implementation"><a class="header" href="#implementation">Implementation</a></h3>
<ul>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>3.1 Go SDK (<code>quicproquo-go</code>)</strong></p>
<ul>
<li>Generated Go types from <code>node.capnp</code> (6487-line codegen, all 24 RPC methods)</li>
<li>QUIC transport via <code>quic-go</code> with TLS 1.3 + ALPN <code>"capnp"</code></li>
<li>High-level <code>qpq</code> package: Connect, Health, ResolveUser, CreateChannel, Send/SendWithTTL, Receive/ReceiveWait, DeleteAccount, OPAQUE auth</li>
<li>Example CLI in <code>sdks/go/cmd/example/</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>3.2 Python SDK (<code>quicproquo-py</code>)</strong></p>
<ul>
<li>QUIC transport: <code>aioquic</code> with custom Cap’n Proto stream handler</li>
<li>Cap’n Proto serialization: <code>pycapnp</code> for message types</li>
<li>Manual RPC framing: length-prefixed request/response over QUIC stream</li>
<li>Async/await API matching the Rust client patterns</li>
<li>Crypto: PyO3 bindings to <code>quicproquo-core</code> for MLS operations</li>
<li>Publish: PyPI <code>quicproquo</code></li>
<li>Example: async bot client</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>3.3 C FFI layer (<code>quicproquo-ffi</code>)</strong></p>
<ul>
<li><code>crates/quicproquo-ffi</code> with 7 extern “C” functions: connect, login, send, receive, disconnect, last_error, free_string</li>
<li>Builds as <code>libquicproquo_ffi.so</code> / <code>.dylib</code> / <code>.dll</code></li>
<li>Python ctypes wrapper in <code>examples/python/qpq_client.py</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>3.4 WASM compilation of <code>quicproquo-core</code></strong></p>
<ul>
<li><code>wasm-pack build</code> target producing 175 KB WASM bundle (LTO + opt-level=s)</li>
<li>13 <code>wasm_bindgen</code> functions: Ed25519 identity, hybrid KEM, safety numbers, sealed sender, padding</li>
<li>Browser-ready with <code>crypto.getRandomValues()</code> RNG</li>
<li>Published as <code>sdks/typescript/wasm-crypto/</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>3.5 WebTransport server endpoint</strong></p>
<ul>
<li>Add HTTP/3 + WebTransport listener to server (same QUIC stack via quinn)</li>
<li>Cap’n Proto RPC framed over WebTransport bidirectional streams</li>
<li>Same auth, same storage, same RPC handlers — just a different stream source</li>
<li>Browsers connect via <code>new WebTransport("https://server:7443")</code></li>
<li>ALPN negotiation: <code>"h3"</code> for WebTransport, <code>"capnp"</code> for native QUIC</li>
<li>Configurable port: <code>--webtransport-listen 0.0.0.0:7443</code></li>
<li>Feature-flagged: <code>--features webtransport</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>3.6 TypeScript/JavaScript SDK (<code>@quicproquo/client</code>)</strong></p>
<ul>
<li><code>QpqClient</code> class: connect, offline, health, resolveUser, createChannel, send/sendWithTTL, receive, deleteAccount</li>
<li>WASM crypto wrapper: generateIdentity, sign/verify, hybridEncrypt/Decrypt, computeSafetyNumber, sealedSend, pad</li>
<li>WebSocket transport with request/response correlation and reconnection</li>
<li>Browser demo: interactive crypto playground + chat UI (<code>sdks/typescript/demo/index.html</code>)</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>3.7 SDK documentation and schema publishing</strong></p>
<ul>
<li>Publish <code>.capnp</code> schemas as the canonical API contract</li>
<li>Document the QUIC + Cap’n Proto connection pattern for each language</li>
<li>Provide a “build your own SDK” guide (QUIC stream → Cap’n Proto RPC bootstrap)</li>
<li>Reference implementation checklist: connect, auth, upload key, enqueue, fetch</li>
</ul>
</li>
</ul>
<hr>
<h2 id="phase-4--trust--security-infrastructure"><a class="header" href="#phase-4--trust--security-infrastructure">Phase 4 — Trust &amp; Security Infrastructure</a></h2>
<p>Address the security gaps required for real-world deployment.</p>
<ul>
<li>
<p><input disabled="" type="checkbox"> <strong>4.1 Third-party cryptographic audit</strong></p>
<ul>
<li>Scope: MLS integration, OPAQUE flow, hybrid KEM, key lifecycle, zeroization</li>
<li>Firms: NCC Group, Trail of Bits, Cure53</li>
<li>Budget and timeline: typically 4-6 weeks, $50K–$150K</li>
<li>Publish report publicly (builds trust)</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>4.2 Key Transparency / revocation</strong></p>
<ul>
<li>Replace <code>BasicCredential</code> with X.509-based MLS credentials</li>
<li>Or: verifiable key directory (Merkle tree, auditable log)</li>
<li>Users can verify peer keys haven’t been substituted (MITM detection)</li>
<li>Revocation mechanism for compromised keys</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>4.3 Client authentication on Delivery Service</strong></p>
<ul>
<li>DS sender identity binding with explicit audit logging</li>
<li><code>sender_prefix</code> tracking in enqueue/batch_enqueue RPCs</li>
<li>Sender identity derived from authenticated session</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>4.4 M7 — Post-quantum MLS integration</strong></p>
<ul>
<li>Integrate hybrid KEM (X25519 + ML-KEM-768) into the OpenMLS crypto provider</li>
<li>Group key material gets post-quantum confidentiality</li>
<li>Full test suite with PQ ciphersuite</li>
<li>Ref: existing <code>hybrid_kem.rs</code> and <code>hybrid_crypto.rs</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>4.5 Username enumeration mitigation</strong></p>
<ul>
<li>5 ms timing floor on <code>resolveUser</code> responses</li>
<li>Rate limiting to prevent bulk enumeration attacks</li>
</ul>
</li>
</ul>
<hr>
<h2 id="phase-5--features--ux"><a class="header" href="#phase-5--features--ux">Phase 5 — Features &amp; UX</a></h2>
<p>Make it a product people want to use.</p>
<ul>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>5.1 Multi-device support</strong></p>
<ul>
<li>Account → multiple devices, each with own Ed25519 key + MLS KeyPackages</li>
<li>Device graph management (add device, remove device, list devices)</li>
<li>Messages delivered to all devices of a user</li>
<li><code>device_id</code> field already in Auth struct — wire it through</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>5.2 Account recovery</strong></p>
<ul>
<li>Recovery codes or backup key (encrypted, stored by user)</li>
<li>Option: server-assisted recovery with security questions (lower security)</li>
<li>MLS state re-establishment after device loss</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>5.3 Full MLS lifecycle</strong></p>
<ul>
<li>Member removal (Remove proposal → Commit → fan-out)</li>
<li>Credential update (Update proposal for key rotation)</li>
<li>Explicit proposal handling (queue proposals, batch commit)</li>
<li>Group metadata (name, description, avatar hash)</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>5.4 Message editing and deletion</strong></p>
<ul>
<li><code>Edit</code> (0x06) and <code>Delete</code> (0x07) message types in <code>AppMessage</code></li>
<li><code>/edit &lt;index&gt; &lt;text&gt;</code> and <code>/delete &lt;index&gt;</code> REPL commands (own messages only)</li>
<li>Database update/removal on incoming edit/delete</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>5.5 File and media transfer</strong></p>
<ul>
<li><code>uploadBlob</code> / <code>downloadBlob</code> RPCs with 256 KB chunked streaming</li>
<li>SHA-256 content-addressable storage with hash verification</li>
<li><code>FileRef</code> (0x08) message type with blob_id, filename, file_size, mime_type</li>
<li><code>/send-file &lt;path&gt;</code> and <code>/download &lt;index&gt;</code> REPL commands with progress bars</li>
<li>50 MB max file size, automatic MIME detection via <code>mime_guess</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>5.6 Abuse prevention and moderation</strong></p>
<ul>
<li>Block user (client-side, suppress display)</li>
<li>Report message (encrypted report to admin key)</li>
<li>Admin tools: ban user, delete account, audit log</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>5.7 Offline message queue (client-side)</strong></p>
<ul>
<li>Queue messages when disconnected, send on reconnect</li>
<li>Idempotent message IDs to prevent duplicates</li>
<li>Gap detection: compare local seq with server seq</li>
</ul>
</li>
</ul>
<hr>
<h2 id="phase-6--scale--operations"><a class="header" href="#phase-6--scale--operations">Phase 6 — Scale &amp; Operations</a></h2>
<p>Prepare for real traffic.</p>
<ul>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>6.1 Distributed rate limiting</strong></p>
<ul>
<li>Current: in-memory per-process, lost on restart</li>
<li>Move to Redis or shared state for multi-node deployments</li>
<li>Sliding window with configurable thresholds</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>6.2 Multi-node / horizontal scaling</strong></p>
<ul>
<li>Stateless server design (already mostly there — state is in storage backend)</li>
<li>Shared PostgreSQL or CockroachDB backend (replace SQLite)</li>
<li>Message queue fan-out (Redis pub/sub or NATS for cross-node notification)</li>
<li>Load balancer health check via QUIC RPC <code>health()</code> or Prometheus <code>/metrics</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>6.3 Operational runbook</strong></p>
<ul>
<li>Backup / restore procedures (SQLCipher, file backend)</li>
<li>Key rotation (auth token, TLS cert, DB encryption key)</li>
<li>Incident response playbook</li>
<li>Scaling guide (when to add nodes, resource sizing)</li>
<li>Monitoring dashboard templates (Grafana + Prometheus)</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>6.4 Connection draining and graceful shutdown</strong></p>
<ul>
<li>Stop accepting new connections on SIGTERM</li>
<li>Wait for in-flight RPCs (configurable timeout, default 30s)</li>
<li>Drain WebTransport sessions with close frame</li>
<li>Document expected behavior for load balancers (health → unhealthy first)</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>6.5 Request-level timeouts</strong></p>
<ul>
<li>Per-RPC timeout (prevent slow clients from holding resources)</li>
<li>Database query timeout</li>
<li>Overall request deadline propagation</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>6.6 Observability enhancements</strong></p>
<ul>
<li>Request correlation IDs (trace across RPC → storage)</li>
<li>Storage operation latency metrics</li>
<li>Per-endpoint latency histograms</li>
<li>Structured audit log to persistent storage (not just stdout)</li>
<li>OpenTelemetry integration</li>
</ul>
</li>
</ul>
<hr>
<h2 id="phase-7--platform-expansion--research"><a class="header" href="#phase-7--platform-expansion--research">Phase 7 — Platform Expansion &amp; Research</a></h2>
<p>Long-term vision for wide adoption.</p>
<ul>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>7.1 Mobile clients (iOS + Android)</strong></p>
<ul>
<li>Use C FFI (Phase 3.3) for crypto + transport (single library)</li>
<li>Push notifications via APNs / FCM (server sends notification on enqueue)</li>
<li>Background QUIC connection for message polling</li>
<li>Biometric auth for local key storage (Keychain / Android Keystore)</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>7.2 Web client (browser)</strong></p>
<ul>
<li>Use WASM (Phase 3.4) for crypto</li>
<li>Use WebTransport (Phase 3.5) for native QUIC transport</li>
<li>Cap’n Proto via WASM bridge (Phase 3.6)</li>
<li>IndexedDB for local state persistence</li>
<li>Service Worker for background notifications</li>
<li>Progressive Web App (PWA) support</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>7.3 Federation</strong></p>
<ul>
<li>Server-to-server protocol via Cap’n Proto RPC over QUIC (see <code>federation.capnp</code>)</li>
<li><code>relayEnqueue</code>, <code>proxyFetchKeyPackage</code>, <code>federationHealth</code> methods</li>
<li>Identity resolution across federated servers</li>
<li>MLS group spanning multiple servers</li>
<li>Trust model for federated deployments</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>7.4 Sealed Sender</strong></p>
<ul>
<li>Sender identity inside MLS ciphertext only (server can’t see who sent)</li>
<li><code>sealed_sender</code> module in quicproquo-core with seal/unseal API</li>
<li>WASM-accessible via <code>wasm_bindgen</code> for browser use</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>7.5 Additional language SDKs</strong></p>
<ul>
<li>Java/Kotlin: JNI bindings to C FFI (Phase 3.3) + native QUIC (netty-quic)</li>
<li>Swift: Swift wrapper over C FFI + Network.framework QUIC</li>
<li>Ruby: FFI bindings via <code>quicproquo-ffi</code></li>
<li>Evaluate demand-driven — only build SDKs people request</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>7.6 P2P / NAT traversal</strong></p>
<ul>
<li>Direct peer-to-peer via iroh (foundation exists in <code>quicproquo-p2p</code>)</li>
<li>Server as fallback relay only</li>
<li>Reduces latency and single-point-of-failure</li>
<li>Ref: <code>FUTURE-IMPROVEMENTS.md § 6.1</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>7.7 Traffic analysis resistance</strong></p>
<ul>
<li>Padding messages to uniform size</li>
<li>Decoy traffic to mask timing patterns</li>
<li>Optional Tor/I2P routing for IP privacy</li>
<li>Ref: <code>FUTURE-IMPROVEMENTS.md § 5.4, 6.3</code></li>
</ul>
</li>
</ul>
<hr>
<h2 id="phase-8--freifunk--community-mesh-networking"><a class="header" href="#phase-8--freifunk--community-mesh-networking">Phase 8 — Freifunk / Community Mesh Networking</a></h2>
<p>Make qpq a first-class citizen on decentralised, community-operated wireless
networks (Freifunk, BATMAN-adv/Babel routing, OpenWrt). Multiple qpq nodes form
a federated mesh; clients auto-discover nearby nodes via mDNS; the network
functions without any central infrastructure or internet uplink.</p>
<h3 id="architecture-1"><a class="header" href="#architecture-1">Architecture</a></h3>
<pre><code> Client A ─── mDNS discovery ──► nearby qpq node (LAN / mesh)
│
Cap'n Proto federation
│
remote qpq node (across mesh)
</code></pre>
<ul>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>F0 — Re-include <code>quicproquo-p2p</code> in workspace; fix ALPN strings</strong></p>
<ul>
<li>Moved <code>crates/quicproquo-p2p</code> from <code>exclude</code> back into <code>[workspace] members</code></li>
<li>Fixed ALPN <code>b"quicnprotochat/p2p/1"</code> → <code>b"quicproquo/p2p/1"</code> (breaking wire change)</li>
<li>Fixed federation ALPN <code>b"qnpc-fed"</code> → <code>b"quicproquo/federation/1"</code></li>
<li>Feature-gated behind <code>--features mesh</code> on client (keeps iroh out of default builds)</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>F1 — Federation routing in message delivery</strong></p>
<ul>
<li><code>handle_enqueue</code> and <code>handle_batch_enqueue</code> call <code>federation::routing::resolve_destination()</code></li>
<li>Recipients with a remote home server are relayed via <code>FederationClient::relay_enqueue()</code></li>
<li>mTLS mutual authentication between nodes (both present client certs, validated against shared CA)</li>
<li>Config: <code>QPQ_FEDERATION_LISTEN</code>, <code>QPQ_LOCAL_DOMAIN</code>, <code>QPQ_FEDERATION_CERT/KEY/CA</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>F2 — mDNS local peer discovery</strong></p>
<ul>
<li>Server announces <code>_quicproquo._udp.local.</code> on startup via <code>mdns-sd</code></li>
<li>Client: <code>MeshDiscovery::start()</code> browses for nearby nodes (feature-gated)</li>
<li>REPL commands: <code>/mesh peers</code> (scan + list), <code>/mesh server &lt;host:port&gt;</code> (note address)</li>
<li>Nodes announce: <code>ver=1</code>, <code>server=&lt;host:port&gt;</code>, <code>domain=&lt;local_domain&gt;</code> TXT records</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>F3 — Self-sovereign mesh identity</strong></p>
<ul>
<li>Ed25519 keypair-based identity independent of AS registration</li>
<li>JSON-persisted seed + known peers directory</li>
<li>Sign/verify operations for mesh authenticity (<code>crates/quicproquo-p2p/src/identity.rs</code>)</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>F4 — Store-and-forward with TTL</strong></p>
<ul>
<li><code>MeshEnvelope</code> with TTL-based expiry, hop_count tracking, max_hops routing limit</li>
<li>SHA-256 deduplication ID prevents relay loops</li>
<li>Ed25519 signature verification on envelopes</li>
<li><code>MeshStore</code> in-memory queue with per-recipient capacity limits and TTL-based GC</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>F5 — Lightweight broadcast channels</strong></p>
<ul>
<li>Symmetric ChaCha20-Poly1305 encrypted channels (no MLS overhead)</li>
<li>Topic-based pub/sub via <code>BroadcastChannel</code> and <code>BroadcastManager</code></li>
<li>Subscribe/unsubscribe, create, publish API on <code>P2pNode</code></li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>F6 — Extended <code>/mesh</code> REPL commands</strong></p>
<ul>
<li><code>/mesh send &lt;peer_id&gt; &lt;msg&gt;</code> — direct P2P message via iroh</li>
<li><code>/mesh broadcast &lt;topic&gt; &lt;msg&gt;</code> — publish to broadcast channel</li>
<li><code>/mesh subscribe &lt;topic&gt;</code> — join broadcast channel</li>
<li><code>/mesh route</code> — show routing table</li>
<li><code>/mesh identity</code> — show mesh identity info</li>
<li><code>/mesh store</code> — show store-and-forward statistics</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>F7 — OpenWrt cross-compilation guide</strong></p>
<ul>
<li>Musl static builds: <code>x86_64-unknown-linux-musl</code>, <code>armv7-unknown-linux-musleabihf</code>, <code>mips-unknown-linux-musl</code></li>
<li>Strip binary: <code>--release</code> + <code>strip</code> → target size &lt; 5 MB for flash storage</li>
<li><code>opkg</code> package manifest for OpenWrt feed</li>
<li><code>procd</code> init script + <code>uci</code> config file for OpenWrt integration</li>
<li>CI job: cross-compile and size-check on every release tag</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>F8 — Traffic analysis resistance for mesh</strong></p>
<ul>
<li>Uniform message padding to nearest 256-byte boundary (hides message size)</li>
<li>Configurable decoy traffic rate (fake messages to mask send timing)</li>
<li>Optional onion routing: 3-hop relay through other mesh nodes (no Tor dependency)</li>
<li>Ref: Phase 7.7 for server-side traffic analysis resistance</li>
</ul>
</li>
</ul>
<hr>
<h2 id="phase-9--developer-experience--community-growth"><a class="header" href="#phase-9--developer-experience--community-growth">Phase 9 — Developer Experience &amp; Community Growth</a></h2>
<p>Features designed to attract contributors, create demo/showcase potential,
and lower the barrier to entry for non-crypto developers.</p>
<ul>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>9.1 Criterion Benchmark Suite (<code>qpq-bench</code>)</strong></p>
<ul>
<li>Criterion benchmarks for all crypto primitives: hybrid KEM encap/decap,
MLS group-add at 10/100/1000 members, epoch rotation, Noise_XX handshake</li>
<li>CI publishes HTML benchmark reports as GitHub Actions artifacts</li>
<li>Citable numbers — no other project benchmarks MLS + PQ-KEM in Rust</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>9.2 Safety Numbers (key verification)</strong></p>
<ul>
<li>60-digit numeric code derived from two identity keys (Signal-style)</li>
<li><code>/verify &lt;username&gt;</code> REPL command for out-of-band verification</li>
<li>Available in WASM via <code>compute_safety_number</code> binding</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>9.3 Full-Screen TUI (Ratatui + Crossterm)</strong></p>
<ul>
<li><code>qpq tui</code> launches a full-screen terminal UI: message pane, input bar,
channel sidebar with unread counts, MLS epoch indicator</li>
<li>Feature-gated <code>--features tui</code> to keep ratatui/crossterm out of default builds</li>
<li>Existing REPL and CLI subcommands are unaffected</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>9.4 Delivery Proof Canary Tokens</strong></p>
<ul>
<li>Server signs <code>Ed25519(SHA-256(message_id || recipient || timestamp))</code> on enqueue</li>
<li>Sender stores proof locally — cryptographic evidence the server queued the message</li>
<li>Cap’n Proto schema gains optional <code>deliveryProof: Data</code> on enqueue response</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>9.5 Verifiable Transcript Archive</strong></p>
<ul>
<li><code>GroupMember::export_transcript(path, password)</code> writes encrypted, tamper-evident
message archive (CBOR records, Argon2id + ChaCha20-Poly1305, Merkle chain)</li>
<li><code>qpq export verify</code> CLI command independently verifies chain integrity</li>
<li>Useful for legal discovery, audit, or personal backup</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>9.6 Key Transparency (Merkle-Log Identity Binding)</strong></p>
<ul>
<li>Append-only Merkle log of (username, identity_key) bindings in the AS</li>
<li>Clients receive inclusion proofs alongside key fetches</li>
<li>Any client can independently audit the full identity history</li>
<li>Lightweight subset of RFC 9162 adapted for identity keys</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>9.7 Dynamic Server Plugin System</strong></p>
<ul>
<li>Server loads <code>.so</code>/<code>.dylib</code> plugins at runtime via <code>--plugin-dir</code></li>
<li>C-compatible <code>HookVTable</code> via <code>extern "C"</code> — plugins in any language</li>
<li>6 hook points: on_message_enqueue, on_batch_enqueue, on_auth, on_channel_created, on_fetch, on_user_registered</li>
<li>Example plugins: logging plugin, rate limit plugin (512 KiB payload enforcement)</li>
</ul>
</li>
<li>
<p><input disabled="" type="checkbox" checked=""> <strong>9.8 PQ Noise Transport Layer</strong></p>
<ul>
<li>Hybrid <code>Noise_XX + ML-KEM-768</code> handshake for post-quantum transport security</li>
<li>Closes the harvest-now-decrypt-later gap on handshake metadata (ADR-006)</li>
<li>Feature-gated <code>--features pq-noise</code>; classical Noise_XX default preserved</li>
<li>May require extending or forking <code>snow</code> crate’s <code>CryptoResolver</code></li>
</ul>
</li>
</ul>
<hr>
<h2 id="summary-timeline"><a class="header" href="#summary-timeline">Summary Timeline</a></h2>
<div class="table-wrapper">
<table>
<thead>
<tr><th>Phase</th><th>Focus</th><th>Estimated Effort</th></tr>
</thead>
<tbody>
<tr><td><strong>1</strong></td><td>Production Hardening</td><td>1–2 days</td></tr>
<tr><td><strong>2</strong></td><td>Test &amp; CI Maturity</td><td>2–3 days</td></tr>
<tr><td><strong>3</strong></td><td>Client SDKs (Go, Python, WASM, FFI, WebTransport)</td><td>5–8 days</td></tr>
<tr><td><strong>4</strong></td><td>Trust &amp; Security Infrastructure</td><td>2–4 days (excl. audit)</td></tr>
<tr><td><strong>5</strong></td><td>Features &amp; UX</td><td>5–7 days</td></tr>
<tr><td><strong>6</strong></td><td>Scale &amp; Operations</td><td>3–5 days</td></tr>
<tr><td><strong>7</strong></td><td>Platform Expansion &amp; Research</td><td>ongoing</td></tr>
<tr><td><strong>8</strong></td><td>Freifunk / Community Mesh</td><td>ongoing</td></tr>
<tr><td><strong>9</strong></td><td>Developer Experience &amp; Community Growth</td><td>3–5 days</td></tr>
</tbody>
</table>
</div>
<hr>
<h2 id="related-documents"><a class="header" href="#related-documents">Related Documents</a></h2>
<ul>
<li><a href="docs/FUTURE-IMPROVEMENTS.html">Future Improvements</a> — consolidated improvement list</li>
<li><a href="docs/PRODUCTION-READINESS-AUDIT.html">Production Readiness Audit</a> — specific blockers</li>
<li><a href="docs/SECURITY-AUDIT.html">Security Audit</a> — findings and recommendations</li>
<li><a href="docs/src/roadmap/milestones.html">Milestone Tracker</a> — M1–M7 status</li>
<li><a href="docs/src/roadmap/authz-plan.html">Auth, Devices, and Tokens</a> — authorization design</li>
<li><a href="docs/src/roadmap/dm-channels.html">DM Channel Design</a> — 1:1 channel spec</li>
</ul>
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